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pantera1 [17]
3 years ago
11

A car travels along highway with a speed of 36 km/h. Find out the distance

Physics
1 answer:
Black_prince [1.1K]3 years ago
5 0

Please find attached photograph for your answer. Hope it helps. Please do comment

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A basic physics question
Anna71 [15]
<h3>1)</h3>

No,kinetic energy cannot be negative since its given by KE=mv²,mass cannot be negative and the square of speed cannot b negative.

<h3>2)</h3>

Yes,any force opposing motion or displacement does negative work. They are often referred to as resistive forces (friction,air resistance,drag...)

<h3>3)</h3>

Nope it does not, it just forces the object to move in a circular path known as a centripetal force. It can accelerate an object by changing it's direction but not it's speed.

<h3>4)</h3>

No it cannot,If an object is sliding on the table (assuming it is not an incline), then most probably that normal force cancels out the weights effect or assuming there is an incline, it cancels the weight's y component.

<h3>5)</h3>

w = f.d.cos \alpha  = f.d.cos90 = 0

The work done is zero

<h3>6)</h3>

w = f.d.cos \theta = f.d.cos0 = f.d

The work is just the product of the magnitude of the force exerted and the displacement of the object.

<h3>7)</h3>

0 <  \theta < 90 \\ 1 < cos \theta < 0

<h3>Work is decreasing but positive</h3>

<h3>8)</h3>

\theta = 90 \\ cos \theta = cos90 = 0

<h3>Work is zero</h3>

<h3>9)</h3>

90 <  \theta < 180 \\ 0 < cos \theta <  - 1

<h3>Work is negative</h3>
3 0
2 years ago
The kicker now kicks the ball with the same speed as in the number of 4,but at 60.0°from the horizontal or 30.0° from the vertic
stealth61 [152]

Answer:

Explanation:

1) The time of flight equation for projectile motion can be used here to find total time in air.

t = 2vsin∅ / g

where v is speed, Ф is launch angle

t = 2×4×sin 60 / 9.8

t = 0.71 seconds

2) Distance where it hit the ground is called as range and has the following standard equation

D = v² sin2Ф/g

D = 4²sin 2×60 / 9.8

D = 1.41m

3) Maximum elevation is maximum time reached

h = v² sin²Ф / 2g

h = 4²sin² 60 / 2*9.8

h = 0.61 m

3 0
3 years ago
What is the magnitude of the electric field at a point that is 0.5m to the right of a small sphere with a net charge of -6.0x10-
zysi [14]

Answer:

lil durk a goat

Explanation:

8 0
2 years ago
The speed of sound in wood is ____ the speed of sound in water. Question 23 options: less than greater than the same as depends
AURORKA [14]

Answer:

Less than

Explanation:

Speed of sound increases with density of the medium.  Since wood is less dense than water, the speed of sound is lower in wood.

7 0
3 years ago
How does the size of the ears help to keep an artic fox warm in a cold environment?
Mice21 [21]
As the artic fox has very small ears it helps prevent the heat from his body from escaping quickly.
The bigger the ears the faster the heat escapes basically.
7 0
3 years ago
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